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<title>固底导航-基于Bootstrap</title>
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<link rel="stylesheet" href="../../dist/css/bootstrap.min.css" >
<style>body {  min-height: 175rem;}
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<body>
<div class="container">
  <div class="jumbotron mt-3">
    <h1> Navbar 固底示例</h1>
    <p class="lead">This example is a quick exercise to illustrate how the bottom navbar works.</p>
    <a class="btn btn-lg btn-primary" href="../../components/navbar.html" role="button">查看 navbar 控件指南 &raquo;</a> </div>
</div>
<nav class="navbar fixed-bottom navbar-expand navbar-dark bg-dark"> <a class="navbar-brand" href="#">Bottom navbar</a>
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarCollapse" aria-controls="navbarCollapse" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button>
  <div class="collapse navbar-collapse" id="navbarCollapse">
    <ul class="navbar-nav mr-auto">
      <li class="nav-item active"> <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a> </li>
      <li class="nav-item"> <a class="nav-link" href="#">Link</a> </li>
      <li class="nav-item"> <a class="nav-link disabled" href="#">Disabled</a> </li>
      <li class="nav-item dropup"> <a class="nav-link dropdown-toggle" href="https://getbootstrap.com" id="dropdown10" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropup</a>
        <div class="dropdown-menu" aria-labelledby="dropdown10"> <a class="dropdown-item" href="#">Action</a> <a class="dropdown-item" href="#">Another action</a> <a class="dropdown-item" href="#">Something else here</a> </div>
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